A witten smack is when you take a wet kitten and smack somebody across the face with it. If you do not have a wet kitten in hand feel free to lick the back of your hand and give the person a good backhand to the face. It was invented by a coupple of bored teens that decided to have a wet kitten fight.

Girn:Oh my gwash I'm like so hot and like everyone loves me!!!
Guy:You better shut up before I witten smack you!